Field-tuned superconductor-insulator transition in BaPb1−xBixO3
P. Giraldo-Gallo, Hanoh Lee, Y. Zhang, M. J. Kramer, M. R. Beasley, T. H. Geballe, I. R. Fisher
DOI 10.1103/PhysRevB.85.174503 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
BaPb1−xBixO3 is found to exhibit a field-tuned superconductor to insulator transition for Bi compositions 0.24 ≤x≤ 0.29. The magnetoresistance of optimally doped samples manifests a temperature-independent crossing point and scaling of the form ρ(T,H)=ρcF(|H−Hc|T−1/zν), where Hc is the field determined by the temperature-independent crossing point, and zν = 0.69 ± 0.03. High-resolution transmission electron microscopy measurements reveal a complex intergrown nanostructure comprising tetragonal and orthorhombic polymorphs. Data are analyzed in terms of both a classical effective medium theory and a field-tuned quantum phase transition, neither of which provides a completely satisfactory explanation for this remarkable phenomenology.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
| Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Superconducting energy gap and a normal-state excitation in Ba0.6K0.4BiO3
similarity 0.97Z. Schlesinger et al.
Source status unknown — claims are unverified
Calculations of the electronic structure and superconducting properties of the Ba(K)Pb(Bi)O3 system
similarity 0.97D. A. Papaconstantopoulos et al.
Source status unknown — claims are unverified
Superconducting and normal states of Ba1−xKxBiO3 studied with use of high-quality thin films
similarity 0.97H. Sato et al.
Source status unknown — claims are unverified
Photoemission and x-ray absorption study of superconducting and semiconducting Ba1−xKxBiO3 single crystals
similarity 0.96M. Qvarford et al.
Source status unknown — claims are unverified
Theory of a higher-order phase transition: The superconducting transition in Ba0.6K0.4BiO3
similarity 0.96Pradeep Kumar
Source status unknown — claims are unverified
Superconducting properties of the Ba1−xRbxBiO3 system
similarity 0.96Izumi Tomeno & Ken Ando
Source status unknown — claims are unverified